Oil filter



' w. A. MCLEAN OIL FILTER Filed Ju1y 10. 1931A o oo o 'O 000Go o0 O 00000 o 0 c)O00 o oooooooo o 0000 00000 .oOo

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UNITED STATES PATENT oEFicE on. FILTER William A.' McLean,

' to C. Schnackels Sons,

Rochester, N. Y., assignor Inc., Rochester, N. Y.,

a corporation of New York- Application July 10, 1931. Serial No. 549,963-

'I Claims. (Cl. 21o-164) My present invention relates to filtersv and more particularly to liquid lters, and it has for its object to provide a device of this character that will be simple in construction, inexpensive to manufacture, comprising few parts, easily assembled and highly efficient in use. The invention is applicable to lubricating oil systems such as are used in internal combustion and other engines, and the improvements are di rected in part toward providing anovel means for trapping the larger stances in the oil through and then further filtering the oil for of another instrumentality.

impurities by means impurities or solid subone instrumentality the ner They are also directed toward rendering both of these filtering mediums renewable and, readily accessible for such purposes and toward providing a general construction contributing to these ends.

. To these and other ends, the invention resides in certain improvements and combinations of parts, all as will be hereinafter more fully described, the nov'el features being pointed out in the claims at the end of the specification.

In the drawing:

Fig. 1 is a central vertical section 'through a filter constructed in accordance with and illustrating lone embodiment of my invention, and

Fig. 2 is a horizontal .section therethrough taken on the line l2--2 the direction of the arr of Fig. 1 and looking in Similar reference numerals 4throughout the several views indicate the same parts.

As before stated, my applicable to oil filters invention is particularly for lubricating systems,

and I have shown it and will describe it in such a connection.,

It may be placed at any point in the lubricating circulating pump. it consists of a main b drain plug A2 at the bottom,

system, preferably adjacent to the intake of the In the present embodiment,

ody or tank 1 having a an outlet 3 near the top and an inlet 4 in the side wall at an interelements 3 and 4'prefs or internally threaded from the material of the ections 5 and 6 leading ump or other source of to the bearings .or other oil is to be used.

point below the intake 4, with an internal shoulder by stamping or spinning thereof, and upon this rests 8 that confines a body of filtering material 9 occupying the bottom of the tank, the nature and function of which body will be later explained. Resting on the screen 8 and on the shoulder 7 through the medium of the screen is a spacing ring 10 which is in the general plane of the intake opening 4 and is provided opposite the latter with an opening l1 to admit the flow of oil from the pipe 5 into a cylindrical central chamber 24, the lower wall of which is constituted by the screen 8 and the 65 upper wall by a similar screen 12 resting upon the top of spacing ring 10.

Spaced above screen' 12 is a foraminous plate 13, the openings in which are relatively large to allow a free passage of oil under pressure. A removable cover 14 rests upon an outwardly turned ange or bead l5 on the upper rim of the tank, making tightconnection therewith through a 'cooperating downwardly turned flange 16 on the said cover and an interposed gasket 17.A A'75 wing bolt 18 extending centrally through the cover is threaded into a collar 19 formed in the center of the foraminous plate 13. Through tightening this bolt, the cover 14 is drawn down set curely and the upward pulling reaction on the by a locking ring 20 having a semi-cylindrical seat in the inner face of the Wall of the tank. The rim of the plate 13 is struck down angularly at 21 to engage the locking ring with a wedging action that tends to force it into its seat rather than to dislodge it. Upon removal of the cover and ring, the bolt may be screwed back into the plate for convenience -in removing it and cleaning it.

The space between screen 12 and plate 13 forms 90 a chamber in which is placed a relatively fine ltering medium 22, such as cotton batting. It is in the form of a disk, is removable to be re-y placed with a fresh filter, and is preferably faced on top andY bottom, as indicated at 23, with cotton gauze or sheeting or other textile to prevent the cotton particles from lodging in and clogging the screens that confine it and also forming( in themselves an intermediate filter of a coarseness between that of the plate and that of the cotton or other interior. IThe element 22 as a whole thus constitutes a removable and replaceable or renewable cartridge that may be separately sold to users of the filter time to time.

In the operation of the device, the oil is pumped in at 4, under pressure, to the central chamber 24. Extremely large impurities in solid form will be caught on the screen 8. The oil with the less coarse impurities is free plate 13 is met for restoring its eiiiciency from to percolate the screen 8 intg and through the body 9, which I have called a filtering material, but which constitutes an interstitial mass, the real function of which is to create a sluggish body of oil. A suitable material to be here employed is a sponge-like body of metal, such as tinsel, copper wool or steel wool. The solid impurities gravitate through this adhering to the metallic shreds by which they are trapped and prevented from rejoining the circulatory stream. Obviously, this happens during periods n which the engine is at rest but also when the pump is going there is little agitation in parts ofthe chamber 24 permitting this iiltering to progress constantly.

From chamber 24, the pressure forces the oil upwardly through screen 12 and the fine filter 22, Whereafter, in cleansed condition, it passes through the foraminous plate 13 and out at the discharge nipple 3.

It is obvious that all of the enclosed parts may be progressively removed from the top of the tank after the loosening of the bolt 18 and the newingthese perishable parts, the tank is easily thoroughly cleaned and drained through the plug 2.

I claim as my invention:

1. In an oil lter or the like, the combination with a tank having an upper discharge connecthe bottom of the tank below the intake connection adapted to be submerged in the body of oil only a sluggish movement thereof while solid particles of impurities adhere thereto or are permitted to gravitate therethrough.

means embodying a body of metallic wool.

' 3. In an oil lter or the like, the combination with a tank having a central chamber and an inlet connection communicating therewith, of interstitial means located in the bottom of the tank below the chamber consisting ofan solid particles of impurities are entangled there.- in, a iiltering medium above the chamber, and an a fresh body. Before reoutlet connection on the tank above the ltering medium.

4. In an oil lter or the like, the combination with a tank having an upper discharge connec-1 tion and a lower intake connection, of a filtering medium in the tank between the two consisting of a batting of fibrous material having textile facings, a pair of oil permeable supports for the batting removably secured within the tank, means for releasably locking the upper support to the walls of the tank, a displaceable cover for the tank, and a clamping means for the latter threaded into one of the supports and by means of which the latter can be removed from the tank or the clamp ing means unscrewed from the support for independent removal of the cover.

5. In an oil lter or the like, the combination with a tank having an upper discharge connection and a lower intake connection and provided with a shoulder below the latter, of interstitial means located in the bottom of the tank below the intake connection adapted to be submerged in the body of oil and permit only a sluggish moveparticles of impurities therethrough, and an oil permeable conning element for the latter supported on the shoulder.

6. In an oil filter or with a tank having an the like, the combination upper discharge connection and a lower intake connection and provided with a shoulder below the latter, of interstitial means located in the bottom of the tank below tering unit resting on the spacing ring between the two connections and embodying an upper foraminous plate, means for locking the latter to the tank wall, a displaceable cover for the tank, and a clamping device for the cover cooperating with and reacting against the foraminous plate.

M A. MCLEAN. 

